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HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks galcontinue="Biodiversity_conservation_and_recovery_in_the_river_basin_of_Asón" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Bazeilles" missing="" />
      <page pageid="153" ns="0" title="BQE" />
      <page pageid="57" ns="0" title="Babina" />
      <page pageid="724" ns="0" title="Bakenhof - Dyke relocation" />
      <page pageid="637" ns="0" title="Beaufayhn river - Ausson gullies" />
      <page pageid="6752" ns="0" title="Becva" />
      <page pageid="914" ns="0" title="Bemmelse Waard – Restoring former floodplains (INTERREG Sustainable Development of Floodplains)" />
      <page pageid="561" ns="0" title="Beneden-Leeuwen - Side channel" />
      <page pageid="430" ns="0" title="Bergen - Removal of Bank Fixation" />
      <page pageid="593" ns="0" title="Bildmuehl river - Lemberg" />
    </pages>
  </query>
</api>